Adjustable Kettlebell Tooth-Meshing Lock for Precise Weight Selection
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Solution Overview
Problem
Conventional kettlebells require inconvenient manual observation and adjustment to ensure reliable combination of weight blocks, lack fine adjustment capabilities, and the rotating shaft cannot rotate freely during use.
Innovation Solution
A kettlebell design featuring a rotating shaft with a fixed shaft and sliding shaft, equipped with pins and engaging rods, allows for clear rotational positioning and free rotation when unloaded, and engages securely with weight blocks through a meshing mechanism involving elastic elements and a handle-driven eccentric grip for precise weight adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating shaft with weight blocks is used to adjust kettlebell weight, then weight selection capability is improved, but the reliability of weight block combination deteriorates due to lack of matching effect
Solution Approach 1:
The patent introduces a connecting plate with connecting teeth as an intermediary component between the rotating shaft and weight blocks. The connecting teeth on the rotating shaft engage with corresponding teeth on the weight blocks, providing a positive mechanical coupling that ensures reliable combination and prevents slippage during exercise use.
Solution Approach 2:
The patent divides the weight adjustment system into segmented components: the rotating shaft with connecting teeth, individual weight blocks with engagement features, and a connecting plate. This segmentation allows each component to have specialized functions while maintaining reliable interconnections through toothed engagement mechanisms.
2Reliability
If a fixed rotating shaft is used for weight adjustment, then weight block combination is achieved, but the ease of operation deteriorates due to inability to perform fine adjustments or free rotation
Solution Approach 1:
The patent transforms the fixed rotating shaft into a dynamic system with a sliding shaft that can move axially within the through groove. This dynamic design allows the shaft to rotate freely when unloaded for easy positioning, and then lock into precise positions when weight blocks are engaged, providing both ease of operation and reliable combination.
Solution Approach 2:
The patent changes the operational parameters of the rotating shaft by allowing it to transition between two states: free rotation when unloaded (easy positioning) and locked engagement when weight blocks are attached (precise positioning). This parameter change enables the shaft to provide both fine adjustment capability and reliable weight block combination.
3Adaptability or versatility
If multiple kettlebells with different weights are used to achieve weight variety, then weight selection capability is improved, but the device complexity and space requirement increase
Solution Approach 1:
The patent makes a single kettlebell universal by enabling it to function with multiple weight configurations. The rotating shaft mechanism allows the same kettlebell body to accommodate different weight blocks, providing weight variety without requiring multiple separate kettlebells, thus reducing device complexity and storage requirements.
4Reliability
If manual observation and adjustment are used to ensure weight block combination, then weight block reliability is achieved, but the ease of operation deteriorates due to inconvenience
Solution Approach 1:
The patent implements a self-service mechanism where the connecting teeth on the rotating shaft automatically engage with the weight blocks during rotation. The mechanical toothed connection provides self-aligning and self-locking functionality, eliminating the need for manual observation and adjustment to ensure proper combination, thereby improving ease of operation while maintaining reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables easy, precise weight adjustments with clear rotational positioning and secure engagement, allowing the rotating shaft to freely rotate when not in use, enhancing user convenience and reliability.
Implementation Method 1
a large teeth plate elastically disposed on a top end of the main body and being able to move elastically in the main body
Data Source
AI summary
A kettlebell comprises a main weight block and several weight blocks, a teeth meshing plate is disposed on a top surface of the main weight block; a rotating shaft having an upper engaging rod and a lower engaging rod, the lower engaging rod optionally engages on the teeth meshing plate; a large teeth plate can move elastically, the large teeth plate is provided with first engaging teeth on a periphery of a through hole annularly; a connecting plate annularly provided with second engaging teeth movably meshing with the first engaging teeth, a lower end surface of the connecting plate is annularly provided with connecting teeth connected with the upper engaging rod. Positions of the connecting plate can be changed through the upper engaging rod, the main weight block can be fixed on the lower engaging rod, so that actions of the kettlebell can be switched reliably, and the rotating shaft can rotate freely without weight.